1, If one -third of minus 8 is not less than four times x.find the largest value of x
in integer
2,
Brand A Brand B
raisin 30% 18%
How many g of dried fruit from Brand B should be added to 350g of dried fruit
from Brand A,such that there is not more than 25% of raisin in the mixture?
QUICK!!!!!
2010-04-09 12:48:02 補充
Brand A is 30%, Brand B is 18%
Inequalities for 2
2010-04-09 9:02 pm
回答 (3)
2010-04-11 4:38 am
✔ 最佳答案
1) 1/3(-8)> or = 4x-8 > or = 12x
x < or = -2/3
so, the largest possible value of x== -1
2)let y g be the amount of dried fruit from Brand B that should be added to 350g of dried fruit from Brand A.
18%y + 30%(350) / y + 350 x100% < OR = 25%
(0.18y +105) x100% < OR = 1/4 (y + 350)
0.18y +105< OR = 0.25y +87.5
17.5< OR = 0.07y
7y > OR =1750
y > OR = 250
SO, AT LEAST 250g of dried fruit of Brand B should be added to 350g of dried fruit of Brand A, such that there is not more than 25% of raisin in the mixture
參考: 自己
2010-04-12 7:28 am
THANKS you for two!
2010-04-09 10:08 pm
Question-1.
1/3(-8) ≧ 4x
-8/3 ≧ 4x
x ≦ -2/3
∴ find the largest value of x in integer is -1.
****
Question-2.
I don't understand the question.
2010-04-09 14:08:54 補充：
≧ means larger than or equal to.
≦ means smaller than or equal to.
1/3(-8) ≧ 4x
-8/3 ≧ 4x
x ≦ -2/3
∴ find the largest value of x in integer is -1.
****
Question-2.
I don't understand the question.
2010-04-09 14:08:54 補充：
≧ means larger than or equal to.
≦ means smaller than or equal to.
收錄日期: 2021-04-23 22:48:25
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100409000051KK00631